10665638 has 8 divisors (see below), whose sum is σ = 16100832. Its totient is φ = 5298696.

The previous prime is 10665637. The next prime is 10665661. The reversal of 10665638 is 83656601.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×10665638² = 227511667894088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 10665598 and 10665607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10665637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16670 + ... + 17297.

It is an arithmetic number, because the mean of its divisors is an integer number (2012604).

Almost surely, 2^10665638 is an apocalyptic number.

10665638 is a deficient number, since it is larger than the sum of its proper divisors (5435194).

10665638 is a wasteful number, since it uses less digits than its factorization.

10665638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34126.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 10665638 is about 3265.8288381359. The cubic root of 10665638 is about 220.1214068186.

The spelling of 10665638 in words is "ten million, six hundred sixty-five thousand, six hundred thirty-eight".